REMOVAL OF 50HZ POWERLINE INTERFERENCE FOR QUALITY DIAGNOSIS OF ECG SIGNAL

摘要

The power line interference (50/60 Hz) is the main source of noise in most of bio-electric signal. In this paper second order infinite impulse response (IIR) notch filter, adaptive notch filtering technique with LMS (least mean square) algorithm and Discrete Wavelet transform method has been proposed for the removal of power line interference from ECG signal. Different ECG signals from MIT/BIH arrhythmia database are used with added power-line interference noise which is common in ECG signal. The result is analyzed using MATLAB software. Basically two synthesis parameters MSE and SNR have been used. The prime aim of this paper is to adapt the discrete wavelet transform (DWT) to improve the ECG signal quality for better clinical diagnosis. The proposed method shows improvement in output SNR is 97.60%.